Backpack vacuum cleaner



FIG. 1 is an front perspective view of the backpack vacuum cleaner;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a side view thereof;

FIG. 5 is a side view thereof, showing the opposite side of FIG. 4;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

The broken lines in FIGS. 1–7 are for illustrative purposes only andform no part of the claimed design.

The ornamental design for a backpack vacuum cleaner, as shown anddescribed.